Basically, if you stand at the center of the sun, did you take all the energy? No, because there is still energy. The sun keeps shining and so forth.
A small target won't take it all that, because the energy is all around him and going outward to the other parts of the sun. If he took it all there wouldn't still be energy.
Thing is the energy is spread over such a large area, that a small target literally can't take it all.
Don't get me wrong the sun is awesome, but all that energy is spread over a too large area.
Edit: On the flipside, the bigger the target is the more energy it will take because it has a larger area.